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460 BCE
Democritus
one of the first to discover the atomic theory, came up with the 1st atomic model. -
Dalton
Proposed that all matter is composed of atoms
Billiard ball model -
Chadwick
tried to see how much charge an electron has. oil drop experiment -
Dalton
discovered the electron experimenting with crookes
plum pudding model -
Rutherford
Over turned Thomson´s model and discovered the radio active element plum pudding model (motified) -
Bohr
Proposed for the hydrogen atom based on Quantun structure of solar system